The radiator that I have right now has 2 hardlines at the bottom of it. I've looked in the 2nd gen FSM, and both 1st gen FSMs (1980 and the 1985 manuals) and they don't even mention it. Should I just plugs these up? or just make them run into each other?

 

Can you take a picture? Sounds like maybe they're for an automatic transmission's oil cooler.

 

Just plug them up unless you have an auto transmission in the car.

 

Nearly all replacenent radiators have thoses 2 line for use in an auto equppied car. Cuts their inventory in half by doing that.

 

auto trans lines connect to those for cooling. no need to plug them. i usually just cut them off.